trace-events: Fix broken build caused by wrong format specifier

mem is an uint64_t value, so %lx was wrong.
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

trace-events

@@ -726,7 +726,7 @@ ppm_save(const char *filename, void *display_surface) "%s surface=%p"
 # hw/qxl.c
 disable qxl_interface_set_mm_time(int qid, uint32_t mm_time) "%d %d"
 disable qxl_io_write_vga(int qid, const char *mode, uint32_t addr, uint32_t val) "%d %s addr=%u val=%u"
-qxl_create_guest_primary(int qid, uint32_t width, uint32_t height, uint64_t mem, uint32_t format, uint32_t position) "%d %dx%d mem=%lx %d,%d"
+qxl_create_guest_primary(int qid, uint32_t width, uint32_t height, uint64_t mem, uint32_t format, uint32_t position) "%d %ux%u mem=%" PRIx64 " %u,%u"
 qxl_create_guest_primary_rest(int qid, int32_t stride, uint32_t type, uint32_t flags) "%d %d,%d,%d"
 qxl_destroy_primary(int qid) "%d"
 qxl_enter_vga_mode(int qid) "%d"